The Action which with "af_deprecated" at event sheet will not be edit-able (not show the correct gui interface)
I though action with "af_deprecated" was only invisible at actions list. But the old actions at event sheet could still be edit-able to keep compatible.
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What do you mean it doesn't show the correct GUI interface?
I don't think any official features use the flag yet so it's kind of an untested feature.
Try these steps:
1. add an action at event sheet then save it
2. set this action to "af_deprecated" (in edittime)
3. reopen capx, try to click the action which have "af_deprecated" and see the gui interface.